1 Scope
This standard specifies the type and dimension, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of high-tensile steel compact chains for mining.
This standard applies to high-tensile steel compact chains for coal mine scraper conveyors used underground, scraper loader and coal planer.
2 Normative references
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 2828.1-2003 Sampling procedures for inspection by attributea-Part1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection (ISO 2859-1: 1999, IDT)
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 12718-2001 High-tensile steel chains (round link) for mining (neq ISO 610: 1990)
3 Definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
compact chains
consisting of flat link and vertical link, with the size and type consistent with that of high-tensile steel chains (round link) for mining, the two sides of the vertical link flat, and the outside width smaller than that of the high-tensile steel chains (round link) for mining
Foreword i
1 Scope
2 Normative references
3 Definitions
4 Product type and size
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
Annex A (Normative) Nominal chain length and tolerance
Annex B (Normative) Chain matched length and tolerance
